I\'d like to merge two data frames where df2
overwrites any values that are NA
or present in df1
. Merge data frames and overwrite val
I think what you want is to keep the values of df2
and only add the ones in df1
that are not present in df2
which is what anti_join
does:
"anti_join return all rows from x where there are not matching values in y, keeping just columns from x."
My solution:
df3 <- anti_join(df1, df2, by = "y") %>% bind_rows(df2)
Warning messages:
1: In anti_join_impl(x, y, by$x, by$y) :
joining factors with different levels, coercing to character vector
2: In rbind_all(x, .id) : Unequal factor levels: coercing to character
> df3
Source: local data frame [4 x 2]
y x1
(chr) (dbl)
1 D 4
2 A 5
3 B 6
4 C 7
this line gives the desired output (in a different order) but, you should pay attention to the warning message, when working with your dataset be sure to read y
as a character variable.